Would it make any sense to cut one of the bow tie wires to a different frequency than the other to get a double tuned circuit type of response? i.e. two SWR minima with a hump in between to increase
Gary Look here http://www.burghardt-amateur.com/Burghardt/HTML/main_frame.html Click New Product Search and then click the Phillystran logo. You'll find the installation instructions. 73 de Jim Smith
You might try Herbach & Rademan at http://www.herbach.com/ Jim VE7FO _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Sta
Take another look at the Thern website where they talk about pulling and lifting. http://www.thern.com/basics.php?loc=main§ion=2 It appears that when they talk about pulling a load they are talki
I ran across something which appears to give a quantitative answer to how far apart to stack beams, whether for the same or different bands. It involves working out the "radius of effective aperture"
Along with Steve's suggestion, what I like about through bolts or all-thread is that you can inspect both ends of them. With lag bolts, if you get some rot around them it seems to me that you'll neve
I was intrigued by the wire tension meter. I've been thinking for some time about making something similar for checking Philly tension. I was thinking of a length of wood (2 x 2?) with 2 dowels (or m
Wow, I'm astonished by the restraint displayed by all TTers, none of whom took the oh-so-tempting bait offered in the subject line. Amazing. Sean, you'll understand what I'm talking about if you've d
Hey, thanks very much guys. I got really suspicious of the method when it told me an adequate stacking distance for two 70 cm beams with 10 dBd gain was 0.04 ft. I was looking for the quick answer bu
I think what James is referring to may be found at http://www.tessco.com/products/displayProducts.do?groupId=576&subgroupId=25 HTH, Jim VE7FO _______________________________________________ See: http
Good heavens, 50 ft of 2" Al is a totally trivial task for the falling derrick method. There are NO safety issues as long as everyone stays far enough away so that nothing can fall on them. A couple
Just catching up on TT posts. 4416 to go. Clay, here's a trick I use to make it easy to replace a broken rope. 1) Run a small rope up through the insulator and back down to ground level again. The ro
Hi folks, I want to put some Rohn 25 up on my flat roof (50 ft if it will work). Will have to go to 4 point guying because 3 point would mean that at least one of the guy anchors would be way too clo
Hi Wilson, As K8RI points out, overturning moment isn't a consideration for a guyed tower. It's a flat roof with 2x12 joists so ought to be able to take quite a bit of downward force. Still "ought to
Well, duuhhh. You think you're confused. As you point out, for a guyed tower I don't need this number. Yes, I understand your other points. Oh well, it was an interesting exercise. I would still like
Stand it on its end and run M/2 with 1 position on the main floor and the other on the 2nd? Sorry, still spinny after big WW RTTY effort. 73, Jim VE7FO I believe many towns have similar zoning laws:
Hmm.. I suspect that you know more about this stuff than I do. However, you state, "I did some testing with a spare rotor, a short piece of mast and a torque wrench. I lubricated the threads to preve
Have you looked at the Glenmartin Hazer? It's a carriage that runs up and down the outside of Rohn 25 like an elevator. You mount your rotator, mast, bearing and yagi on the carriage. Now you can win
Dick I found the following in the back pages of QST. ALWAYS a good place to start. DX Engineering has this stuff. They sell a rather unusual style of cable stripping tool, the DXE UT-8213 stripper fo
Back in the day when I was training high school electronics shop teachers we used a variety of methods to produce PC boards. In general, the results were very good provided the student followed the i